Charles conner



I UNITED. STATES PATENT OFFICE.

GHABLES'GONNER, OF NEW YORK, N. Y.

RUBBER COMPOUND.

SPECIFICATION forming part of Letters Patent No. 258,021, dated May 16, 1882.

Application tiled March 18, 1882.

To all whom it may concern:

Be it known that I, CHARLES OONNER, of the city, county, and State of New York, have invented a new Rubber Compound, of which the following is a full, clear, and exact description.

My invention consists of a rubber compound or composition which will stand a high degree of heat.

My composition consists of the following ingredients, combined in substantially the proportions and manner stated, viz: raw indiurubber, one pound; soda, two pounds; lime, four ounces; camphor, three drains; sulphur, one ounce and ten drains. These ingredients are first thoroughly mixed or mingled by working the mass on the rubber-grinding machine or mill in the same manner rubber is worked in the vulcanizing process. From the mill the mass is taken to the calendering-machine and rolled down into a sheet of suitable thickness to suit the purpose for which it is to be used, and then thissheet is put into a room or compartment and heated by steam or otherwise up to a temperature of about 290 Fahrenheit.

(No specimens.)

In case the rubber is to be used for wrapping wire or similar purposes, the sheets will in such case be cut. into ribbons of suitable width and applied to the wire before heating, and then the wrapped wire will be placed in the room or compartment and heated to the sulphur, in about the proportions specified.

CHARLES UONNER. Witnesses; H. A. West, C. SEDGWIGK. 

